Rise of the Autumn Queen (Autumn Queen Trilogy #2) by Savannah Stoltz:
 
After a chance encounter alters her fate, Princess Aurelia Amberheart moves forward with her quest to bring her aunt to justice. Accompanied by her chosen family and her loyal pegasus, she continues through the kingdoms of Iaselion in hopes of challenging the Queen of the Westlands for the throne.

Despite her best efforts to ignore her complicated feelings for Prince Finneas Ravencrest, their paths seem to cross time and again as Aurelia navigates threats of coercion, ancient prophecies, and the untamed power of her newfound magic.

As enemies intent on her destruction close in from all sides, Aurelia struggles to garner crucial alliances while keeping her loved ones safe. Will her demand for justice be enough to fulfill her goal, or will her relentless ambition consume all she holds dear?

Full of magic, adventure, and sizzling romance, Rise of the Autumn Queen is book two in the epic Autumn Queen Trilogy.